Addor, Eugene E. 1972. Theodolite surveying for nondestructive biomass sampling. In: Research on coniferous forest ecosystems: first year progress in the coniferous forest biome, US/IBP: Proceedings of a symposium; 1972 March 23-24; Bellingham, WA. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station: 167-176.
By theodolite surveying, the relative location of points in space may be calculated by triangulation. With theaid of computers, data gathered by theodolite surveying may provide a dimensional analysis of individual trees.Because the system is nondestructive, the rates and patterns of change in the spatial structure of trees and standsmay be monitored by repetitive surveying. This paper presents a preliminary test of the approach upon trees in a40-year-old Douglas-fir (Pseudotsuga menziesii) plantation in western Washington. From experience gained inthe initial experiment, recommendations are made to increase the precision of repetitive measurements_